Aircraft Stainless Steel S151 / S151D (Jethete M152 / MSRR 6503)

Technical Data Sheet

Chemical Composition Limits

Weight%

C

Si

Mn

P+S max

Cr

Mo

Ni

N

V

S151

0.08-0.13

0.35 max

0.50-0.90

P 0.030
S 0.025

11-12.5

1.50-2.0

2-3

0.02-0.04

0.25-0.40

BS S151 is the British aerospace standard for stainless steel alloy Jethete M152. S151 is a creep and corrosion resistant, hardened and tempered steel with a usual upper temperature limit of 560°C. It combines very good toughness and creep rupture properties making it an excellent alloy for use in highly stressed turbine blades, discs, screws, bolts and rings. S151 is usually supplied in the finally heat treated condition, although is available softened at larger diameter, and has a limiting ruling section of 150mm (6"). It can also be supplied dual certified to MSRR 6503.

The heat treatment for BS S151 is as follows:
Softening: 670-720°C for 6 hours followed by air cool - Designated BS S151A
Harden: 1050°C (+/-10) followed by air cool
Temper: 650°C (+/-5) followed by air cool - Designated BS S151D

Typical Mechanical Properties

Grade

Treatment

Tensile Strength Rm , N/mm²

Proof Stress Rp 0.2, N/mm²

Elongation in 5.65 √Cross Sectional Area%

Hardness HB

Ruling Section

S151A

Solution Annealed

-

-

-

311 max

S151D

Hardened and Tempered

930-1130

780

14

286-311

6"

Availability Alloy S151 is available in Bar, for all stock availability contact Sales.

Disclaimer
Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.